Is Guild Wars region locked?

I've been hearing a lot about the popular MMORPG Guild Wars lately, and I'm considering joining the community. However, before I make the leap, I have a crucial question that I need answered. Is Guild Wars region locked? I'm concerned that if I purchase the game in one region, I might not be able to play with my friends from other regions. This could greatly impact my overall gaming experience, so I want to make sure I understand the situation clearly. If Guild Wars is indeed region locked, I'll need to consider alternative options or find a way to work around this limitation. Could you please clarify if there are any regional restrictions for Guild Wars, and if so, what are the specifics? Thank you for your assistance in this matter.